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clear
//
//
//
//Variable declaration
h=1
k=1
l=1 //miller indices
a=0.352 //lattice parameter(nm)
theta=(28+(30/60))*%pi/180 //angle(radian)
hp=6.626*10**-34 //plancks constant(Js)
m=1.67*10**-27 //mass of proton(kg)
kB=1.38*10**-23 //boltzmann constant
//Calculation
d=a/sqrt(h**2+k**2+l**2)
lamda=2*d*sin(theta) //wavelength(nm)
T=(hp**2)/(3*m*kB*(lamda*10**-9)**2) //effective temperature of neutrons(K)
//Result
printf("\n effective temperature of neutrons is %0.0f K",T)
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